You report blocked public footpaths in Gwynedd directly to the council using their online “Footpath enquiry / complaint” form Report a problem or by phone 01766 771000 ask for Public Rights of Way team.
Please provide
Grid reference or a very clear location description.
Brief description of the obstruction (e.g. fallen tree, locked gate, barbed wire, crops, slurry).
One or two photos if possible, which you can usually upload via the online form.